Grant: 55mph roads often (always?) have 45mph minimum. So there's your legal P&G range. You should be able to legally glide down to 45 on the interstate too, but you may opt not to depending on conditions and the civility of the rest of the pack.
Re: groceries: is there any chance someone in the family was heading near the grocery store more than 1x/week anyway, like if they work in that town? Then the grocery needs can still be fulfilled with a 4 bag capacity. Or, as you noted, perhaps like for every other land-based vehicle a trailer or some sort of extra-capacity device can be employed when needed.
P.S. SIX gallons of milk/week- sounds like you need a goat or a cow.
Last edited by Frank Lee; 09-18-2011 at 12:17 PM..
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